can‘t determine target‘s VM version 问题解决方法

解决方法"/>

can‘t determine target‘s VM version 问题解决方法

can't determine target's VM version问题解决方法

问题描述

执行jmap等java相关工具的时候报错如下：

[fdse@dn3 ~]$ jmap 72838
Attaching to process ID 72838, please wait...
Error attaching to process: java.lang.RuntimeException: can't determine target's VM version : field "_reserve_for_allocation_prefetch" not found in type Abstract_VM_Version
sun.jvm.hotspot.debugger.DebuggerException: java.lang.RuntimeException: can't determine target's VM version : field "_reserve_for_allocation_prefetch" not found in type Abstract_VM_Versionat sun.jvm.hotspot.HotSpotAgent.setupVM(HotSpotAgent.java:435)at sun.jvm.hotspot.HotSpotAgent.go(HotSpotAgent.java:305)at sun.jvm.hotspot.HotSpotAgent.attach(HotSpotAgent.java:140)at sun.jvm.hotspot.tools.Tool.start(Tool.java:185)at sun.jvm.hotspot.tools.Tool.execute(Tool.java:118)at sun.jvm.hotspot.tools.PMap.main(PMap.java:72)at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)at java.lang.reflect.Method.invoke(Method.java:498)at sun.tools.jmap.JMap.runTool(JMap.java:201)at sun.tools.jmap.JMap.main(JMap.java:130)
Caused by: java.lang.RuntimeException: can't determine target's VM version : field "_reserve_for_allocation_prefetch" not found in type Abstract_VM_Versionat sun.jvm.hotspot.runtime.VM.<init>(VM.java:291)at sun.jvm.hotspot.runtime.VM.initialize(VM.java:370)at sun.jvm.hotspot.HotSpotAgent.setupVM(HotSpotAgent.java:431)... 11 more

原因

进程使用的JDK版本与当前执行jmap环境的java版本不一致

查看72838进程的启动命令：

fdse      72838      1  0 Sep02 ?        00:10:39 /home/fdse/user/Component/sonar/sonarJava/jdk-11.0.4/bin/java -jar -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=10.176.34.85:5010 -Dspring.config.location=/home/fdse/codeWisdom/service/issue/config/application-issue.properties /home/fdse/codeWisdom/service/issue/issue-service-1.0.3.jar

发现此进程使用jdk-11.0.4执行

那么当前环境下的版本是：

[fdse@dn3 ~]$ java -version
java version "1.8.0_131"
Java(TM) SE Runtime Environment (build 1.8.0_131-b11)
Java HotSpot(TM) 64-Bit Server VM (build 25.131-b11, mixed mode)

解决方法

使用与执行进程相同的JDK执行jmap，问题解决

[fdse@dn3 ~]$ /home/fdse/user/Component/sonar/sonarJava/jdk-11.0.4/bin/jmap 72838
Usage:jmap -clstats <pid>to connect to running process and print class loader statisticsjmap -finalizerinfo <pid>to connect to running process and print information on objects awaiting finalizationjmap -histo[:live] <pid>to connect to running process and print histogram of java object heapif the "live" suboption is specified, only count live objectsjmap -dump:<dump-options> <pid>to connect to running process and dump java heapjmap -? -h --helpto print this help messagedump-options:live         dump only live objects; if not specified,all objects in the heap are dumped.format=b     binary formatfile=<file>  dump heap to <file>Example: jmap -dump:live,format=b,file=heap.bin <pid>